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Preparation method of granular urea containing humic acid synergistic vector suitable for corn topdressing

A technology of granular urea and humic acid, applied in urea compound fertilizer, nitrogen fertilizer, organic fertilizer, etc., can solve the problem of no humic acid urea

Inactive Publication Date: 2019-02-15
INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are no patent applications and related materials for humic acid urea suitable for corn topdressing

Method used

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  • Preparation method of granular urea containing humic acid synergistic vector suitable for corn topdressing

Examples

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Comparison scheme
Effect test

Embodiment 1

[0083] Example 1: Preparation of urea suitable for corn topdressing with humic acid synergistic carrier

[0084] The implementation steps of this embodiment are as follows:

[0085] A, preparation of humic acid extractant

[0086] Add 30 parts by weight of monoethanolamine, 8 parts by weight of dimethylformamide and 8 parts by weight of ethylene glycol to 2000 parts by weight of water at a temperature of 60°C, stir and dissolve at a speed of 60 rpm, and cool the obtained solution to a temperature of 30°C. Below ℃, obtain described humic acid extractant;

[0087] B, preparation of humic acid extract

[0088] Add 100 parts by weight of weathered coal humic acid mineral raw materials with a particle size of 150 meshes to 1250 parts by weight of the humic acid extractant obtained in step A, then gradually raise its temperature to 90°C under stirring at 100rpm, and at this Maintain the temperature for 40 minutes, then cool to room temperature, centrifuge at a speed of 5000 rpm f...

Embodiment 2

[0095] Example 2: Preparation of humic acid synergistic carrier for urea suitable for corn topdressing

[0096] The implementation steps of this embodiment are as follows:

[0097] A, preparation of humic acid extractant

[0098] Add 20 parts by weight of diethanolamine, 5 parts by weight of dimethylformamide and 5 parts by weight of ethylene glycol to 1400 parts by weight of water at a temperature of 64°C, stir and dissolve at a speed of 100 rpm, and cool the obtained solution to a temperature of 30 Below ℃, obtain described humic acid extractant;

[0099] B, preparation of humic acid extract

[0100] 100 parts by weight of lignite humic acid mineral raw materials with a particle size of 200 meshes are added to 800 parts by weight of the humic acid extractant obtained in step A, and then its temperature is gradually increased to 90 ° C under stirring at a rotating speed of 130 rpm, and at this temperature Keep for 48 minutes, then cool to room temperature, centrifuge for 3...

Embodiment 3

[0107] Example 3: Preparation of urea suitable for corn topdressing with humic acid synergistic carrier

[0108] The implementation steps of this embodiment are as follows:

[0109] A, preparation of humic acid extractant

[0110] Add 40 parts by weight of N-methyldiethanolamine, 10 parts by weight of dimethylformamide and 10 parts by weight of ethylene glycol to 1000 parts by weight of water at a temperature of 67°C, stir and dissolve at a speed of 180 rpm, and obtain a solution cooling to a temperature below 30°C to obtain the humic acid extractant;

[0111] B, preparation of humic acid extract

[0112] Add 100 parts by weight of the weathered coal humic acid mineral raw material with a particle size of 250 meshes to 1500 parts by weight of the humic acid extractant obtained in step A, then gradually raise its temperature to 90°C under stirring at a rotating speed of 165rpm, and at this temperature kept at 2000rpm for 60min, then cooled to room temperature, centrifuged fo...

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Abstract

The invention relates to a preparation method of a granular urea containing humic acid synergistic vector suitable for corn topdressing. The preparation method comprises the steps of preparation of ahumic acid extracting agent, preparation of a humic acid extracting solution, preparation of a chelated zinc solution, preparation of the humic acid synergistic vector, preparation of granular urea containing the humic acid synergistic vector and the like. By the granular urea containing the humic acid synergistic vector suitable for corn topdressing in summers, pH of soil of 1 cm fertilizer of urea can be remarkably reduced by 0.5-1.2 pH units, the urease activity of soil treated the urea can be lower than the urease activity of soil treated by commercial urea by 13%-32%, and it shows that the decomposition and conversion speed of the humic acid urea is obviously reduced; and the volatilization of nitrogen from ammonia of the urea is lower than the volatilization of nitrogen from ammoniaof the commercial urea by 48.0%-57.3%. Compared with the commercial urea, the humic acid urea has the advantages that the yield of corns is averagely increased by 16.1%, and the utilization rate of anitrogen fertilizer is increased by 10.7%.

Description

【Technical field】 [0001] The invention relates to the technical field of fertilizer production. More specifically, the invention relates to a method for preparing granular urea containing a humic acid synergistic carrier suitable for topdressing corn. 【Background technique】 [0002] Urea is the most important nitrogen fertilizer variety in my country. However, due to its high activity and easy conversion loss, the utilization rate in the current season is only 30% to 35%, causing huge economic losses and serious environmental risks. Ammonia is present in PM2.5 The mass concentration accounts for about 30%, and some heavily polluted weather exceeds 60%. Summer maize topdressing season has high temperature, high urease activity, fast conversion of urea, and large loss of ammonia volatilization. Slowing down the decomposition rate of urea and reducing soil urease activity are the main ways to reduce its loss. Humic acid is rich in functional groups such as quinone group and k...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04C05G3/80
CPCC05B17/00C05G3/00C05G3/80C05C9/00C05D9/02C05F11/02
Inventor 袁亮赵秉强李燕婷林治安张水勤王薇
Owner INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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